Kai Zhang

US Patent:

20220385898, Dec 1, 2022

Filed:

Jul 1, 2022

Appl. No.:

17/856631

Inventors:

- Los Angeles CA, US
Li Zhang - Los Angeles CA, US
Jizheng Xu - Los Angeles CA, US
Kai Zhang - Los Angeles CA, US

International Classification:

H04N 19/117
H04N 19/157
H04N 19/70
H04N 19/136
H04N 19/186
H04N 19/174
H04N 19/172

Abstract:

A method of video processing comprises performing a conversion between a video unit of a video and a bitstream of the video according to a rule, wherein the rule specifies that whether a cross-component adaptive loop filter (CC-ALF) mode and an adaptive loop filter (ALF) mode are enabled for coding the video unit are indicated in the bitstream in a mutually independent manner.

US Patent:

20220377332, Nov 24, 2022

Filed:

Jun 30, 2022

Appl. No.:

17/810187

Inventors:

- Los Angeles CA, US
Li Zhang - Los Angeles CA, US
Jizheng Xu - Los Angeles CA, US
Kai Zhang - Los Angeles CA, US

International Classification:

H04N 19/12
H04N 19/186
H04N 19/70
H04N 19/184
H04N 19/132

Abstract:

A method of video processing includes performing a conversion between a video unit of a video and a bitstream of the video according to a rule, wherein the rule specifies whether the bitstream includes at least one of a control flag of a chroma block-based delta pulse code modulation (BDPCM) mode, a palette mode, or an adaptive color transform (ACT) mode is based on a value of a chroma array type of the video.

US Patent:

20220329826, Oct 13, 2022

Filed:

Jun 10, 2022

Appl. No.:

17/837867

Inventors:

- Grand Cayman, KY
Kai ZHANG - Los Angeles CA, US
Li ZHANG - Los Angeles CA, US
Yuwen HE - Los Angeles CA, US
Hongbin LIU - Beijing, CN

International Classification:

H04N 19/159
H04N 19/176
H04N 19/70
H04N 19/147

Abstract:

Example implementations include a method, apparatus and computer-readable medium of video processing, including constructing, during a conversion between a current video block of a video and a bitstream of the video, at least one template set for the current video block from a plurality of sub-templates. The one or more sub-templates may be selected from a plurality of sub-templates including: a left sub-template, an above sub-template, a right-above sub-template, a left-below sub-template, and a left-above sub-template. The implementations further include deriving at least one intra-prediction mode (IPM) based on cost calculations. The implementations include determining, based on the at least one IPM, a final predictor of the current video block. The implementations include performing the conversion based on the final predictor.

US Patent:

20220295088, Sep 15, 2022

Filed:

Mar 12, 2021

Appl. No.:

17/200628

Inventors:

- Grand Cayman, KY
Kai ZHANG - Los Angeles CA, US
Hongbin LIU - Beijing, CN
Li ZHANG - Los Angeles CA, US
Yue WANG - Beijing, CN

International Classification:

H04N 19/513
H04N 19/137
H04N 19/105
H04N 19/159
H04N 19/176

Abstract:

Embodiments of the present disclosure provide methods, apparatuses and computer storage media for video processing. One example method comprises determining, during a conversion between a current video block of a video and a bitstream of the video, a set of motion candidates for the current video block; determining, for each motion candidate in the set of motion candidates, a refined motion candidate by performing a local search around the each motion candidate based on a template matching cost rule; determining, from a set of refined motion candidates generated for the set of motion candidates, a target motion candidate for the current video block; and performing the conversion based on the target motion candidate.

US Patent:

20220295089, Sep 15, 2022

Filed:

Mar 12, 2021

Appl. No.:

17/200631

Inventors:

- Grand Cayman, KY
Kai ZHANG - Los Angeles CA, US
Hongbin LIU - Beijing, CN
Li ZHANG - Los Angeles CA, US
Yue WANG - Beijing, CN

International Classification:

H04N 19/513
H04N 19/137
H04N 19/105
H04N 19/46
H04N 19/176

Abstract:

Embodiments of the present disclosure provide methods, apparatuses and computer storage media for video processing. One example method comprises determining, during a conversion between a current video block of a video and a bitstream of the video, at least one set of motion candidates for the current video block, each motion candidate comprising predicted motion information determined from neighboring video blocks of the current video block; determining, based on a template of the current video block and from the at least one set of motion candidates, a target motion candidate for the current video block by using a template matching cost rule; and performing the conversion based on the target motion candidate.

US Patent:

20220295090, Sep 15, 2022

Filed:

Mar 12, 2021

Appl. No.:

17/200632

Inventors:

- Grand Cayman, KY
Kai ZHANG - Los Angeles CA, US
Hongbin LIU - Beijing, CN
Li ZHANG - Los Angeles CA, US
Yue WANG - Beijing, CN

International Classification:

H04N 19/513
H04N 19/137
H04N 19/105
H04N 19/132
H04N 19/186
H04N 19/176

Abstract:

Embodiments of the present disclosure provide methods, apparatuses and computer storage media for video processing. One example method comprises determining, during a conversion between a current video block of a video and a bitstream of the video, a motion candidate for the current video block; refining the motion candidate by performing a local search around the motion candidate based on a template matching cost rule; and performing the conversion based on the refined motion candidate, wherein a search order of the local search is related to a coding mode of the current video block.

US Patent:

20220248025, Aug 4, 2022

Filed:

Jan 25, 2021

Appl. No.:

17/157698

Inventors:

- Grand Cayman, KY
Kai Zhang - Los Angeles CA, US
Li Zhang - Los Angeles CA, US

International Classification:

H04N 19/132
H04N 19/105
H04N 19/186
H04N 19/176

Abstract:

Example implementations include a method, apparatus and computer-readable medium of video coding, comprising receiving the code block and one or more neighbor samples and determining the value of beta based on at least one of an average chroma value, a midrange chroma value, a median chroma value, an average luma value, a midrange luma value, or a median luma value of two or more neighbor samples.

US Patent:

20220239897, Jul 28, 2022

Filed:

Jan 25, 2021

Appl. No.:

17/157706

Inventors:

- Grand Cayman, KY
Kai ZHANG - Los Angeles CA, US
Li ZHANG - Los Angeles, US

Assignee:

Lemon Inc. - Grand Cayman

International Classification:

H04N 19/103
H04N 19/176
H04N 19/184
H04N 19/186

Abstract:

Example implementations include a method, apparatus and computer-readable medium of video coding, comprising receiving the code block and one or more neighbor samples and determining the value of beta based on at least one of an average chroma value, a midrange chroma value, a median chroma value, an average luma value, a midrange luma value, or a median luma value of two or more neighbor samples.